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Chris Cottrell

  • Posts: 3162
Positioning pumps
« on: August 29, 2006, 09:55:33 pm »
When we put the pump in its place in a van does it have to be in any particular position? because I'm having a few problems with water syphoning back down away from the pump after a short rest , I have at the mo put my trolley on the side of the van temporarily whilst I wait for the tank to be secured with brackets and straps and as you can see from the pic its above the tank so the pump has to lift the water to start with before it pumps it to the hose

I see most pumps are level with the bottom of the tank is this the norm ?

dai

  • Posts: 3503
Re: Positioning pumps
« Reply #1 on: August 29, 2006, 10:12:11 pm »
My pump is above the containers and I have no problem. If the water is syphoning back I would check that your connectors are not leaking air. If you suck up a straw and keep your finger over the end, the liquid will not fall back into the glass.
Take your finger away and it runs back at once. Air must be getting in to allow the water to drop back. Dai

neil100

  • Posts: 1137
Re: Positioning pumps
« Reply #2 on: August 29, 2006, 10:28:20 pm »
Facelift fitted my van system and they positioned the pumps as low as they could get them near the van floor as shown in pic, Pumps are just behind the hose reels. I asked why had they not put them a little higher up because if I need to change the pressure switch I have to take the pumps of there mountings to get to them.

They said the pumps are not under as much pressure, When the tank is full gravity forces the water down which helps the pumps as they are not working as hard to draw the water in, they are just pumping it through the hose with the help of gravity.

Chris Cottrell

  • Posts: 3162
Re: Positioning pumps
« Reply #3 on: August 29, 2006, 10:34:55 pm »
Neil

I see you have two pumps and two batteries, I have read with interest you battery thread but do you think you need two batteries as i have been wondering if 1 x 85Ah leisure battery will run two pumps, also you have 90 degree connecters on your reels any idea where I could get some of those?

Chris Cottrell

  • Posts: 3162
Re: Positioning pumps
« Reply #4 on: August 29, 2006, 10:47:17 pm »
Mine is a plastic tray with drains at the front

Neils is protectacote I assume , looks good too

neil100

  • Posts: 1137
Re: Positioning pumps
« Reply #5 on: August 29, 2006, 11:07:35 pm »
Hi Chris,

I have allways had two batteries, just in case. My pumps are supposed to draw 7amps each, thats up to 14amps an hour x 4hrs = 56amps. In winter if the temp is hovering around freezing you can loose 25% of your batteries effeciency. So an 85amp battery will probably give the Equivalent of 64amps.

I have just moved my DI vessell on the right, outside of the container it was in so that I can now put my two new 110amp batteries in next to each other.

Those were supplied by Facelift, give them a ring to see if they will supply you with the 90 degree connecters.

Yes its Protekote on the van floor. Fantastic stuff. Mind you the van floor hardly gets wet, The van has a drainage point under the plastic gaurd at the back of the van, and it drains out at the front on the side door.

Nel.

freshwater

  • Posts: 277
Re: Positioning pumps
« Reply #6 on: August 29, 2006, 11:30:06 pm »
Pump as low as possible, if you have it high up you may get run back into your tank and get a air lock.

steve@freshwatersystems.co.uk

welmac

  • Posts: 145
Re: Positioning pumps
« Reply #7 on: August 30, 2006, 01:37:03 pm »
we put the pump low down as we used to find that if it was higher up (above water level) you can get probs with it not priming.

they are inside the box shown here with the varistream on the out side
Gary - WELMAC SYSTEMS